13301211311221 has 4 divisors (see below), whose sum is σ = 13301219651500. Its totient is φ = 13301202970944.

The previous prime is 13301211311191. The next prime is 13301211311249. The reversal of 13301211311221 is 12211311210331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4947781858321 + 8353429452900 = 2224361^2 + 2890230^2 .

It is a cyclic number.

It is not a de Polignac number, because 13301211311221 - 2²⁹ = 13300674440309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13301211311192 and 13301211311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13301214311221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948066 + ... + 5244163.

It is an arithmetic number, because the mean of its divisors is an integer number (3325304912875).

Almost surely, 2^{13301211311221} is an apocalyptic number.

It is an amenable number.

13301211311221 is a deficient number, since it is larger than the sum of its proper divisors (8340279).

13301211311221 is an equidigital number, since it uses as much as digits as its factorization.

13301211311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340278.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13301211311221 its reverse (12211311210331), we get a palindrome (25512522521552).

The spelling of 13301211311221 in words is "thirteen trillion, three hundred one billion, two hundred eleven million, three hundred eleven thousand, two hundred twenty-one".